stereochemistry (organic chemistry).pptx

irabiafiaz 16 views 105 slides Aug 06, 2024
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About This Presentation

Stereochemistry

Size: 6.9 MB
Language: en
Added: Aug 06, 2024
Slides: 105 pages

Slide Content

Dr. Tayyaba Shahzadi Assistant Professor GC Women      nbnb University Sialkot

Eclipsed conformation Ethane

Eclipsed conformation Ethane

Staggered conformation Ethane

Staggered conformation Ethane

Projection formulas of the staggered conformation of ethane Newman Sawhorse H H H H H H H H H H H H

Conformational analysis of propane Eclipsed conformation 1=C-H,C-CH3 parallel 2=C-H, C-H parallel Less stable than ethane due to Torsional strain + non-bonded van der Waals repulsive (steric strain) forces due to methyl group Or 16.2 KJ/ mol

Conformational analysis of n-butane

Ring strain =109.5˚-60˚= 49.5˚ Angle strain

Ring strain =109.5˚-90˚= 19.5˚ Angle strain

Nonplanar envelope
Tags
organic chem stereo chem
Categories
Technology Science
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